I was silly enough to buy one. After just 1 time cranking out lambburgers for 10 people that thing was relegated to the white elephant give away pile and I placed an order for the kitchenaid attachment.
Coffee is harder on grinders (because of its oils) than spices and more finikey about consistency. A cheap blade coffee grinder (ironically not really any good for coffee) should work fine for spices.
http://articulo.mercadolibre.com.ar/MLA-452635778-molinillo-electrico-de-cafe-coolbrand-acero-inox-multiuso-_JM something like this would probably work fine for you.